CN113314033A

CN113314033A - Display device

Info

Publication number: CN113314033A
Application number: CN202110548905.2A
Authority: CN
Inventors: 周菁
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-08-27
Also published as: WO2022241838A1; US20240215397A1; US11957031B2; US20240016037A1

Abstract

The embodiment of the invention provides a display device. The display device includes: the flexible screen body comprises a plane area and a bending area connected with the plane area; the color film is arranged on the flexible screen body and at least covers the plane area; the protective layer is arranged on the flexible screen body and at least covers part of the bending area; the cover plate is arranged on the color film and at least covers the plane area; wherein, in the overlapping area of the protective layer and the cover plate, the distance between the protective layer and the cover plate is larger than or equal to a preset value. According to the display device provided by the embodiment of the invention, the distance between the protective layer and the cover plate is larger than or equal to the preset value in the overlapped area of the protective layer and the cover plate, so that the cover plate cannot extrude the protective layer, and the cracking risk of the display device is eliminated.

Description

Display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display device.

Background

For an Organic Light-Emitting Diode (OLED) display panel, the polarizer can effectively reduce the reflectivity of the OLED display panel under strong Light, but the OLED display panel loses about 58% of the Light emission, which greatly increases the service life burden of the OLED display panel, and the polarizer has a thickness of about 100 μm, is thick and brittle, and is not favorable for the development of dynamic bending products.

In order to develop a dynamic bending product based on an OLED display panel, a non-polarizer (POL-less) technology is generally used to manufacture the OLED display panel, and the POL-less technology refers to a technology in which a Color Film (CF) is used to replace a polarizer. The color film is composed of a red color resistor, a green color resistor, a blue color resistor and a Black Matrix (BM), wherein in the OLED display panel, the red color resistor, the green color resistor and the blue color resistor respectively play roles in emitting light of the red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit, and the Black Matrix mainly plays roles in preventing light leakage of the OLED display panel and reducing the reflectivity of the OLED display panel. The color film can reduce the reflectivity of the OLED display panel under strong light to a certain extent, can improve the light-emitting rate of the OLED display panel from 42% to 60%, has the thickness of about 5 microns, is much smaller than that of the polarizer, has high flexibility, can reduce the overall thickness of the OLED display panel, and is favorable for development of dynamic bending products.

Further, in order to implement a narrow bezel design of the OLED display panel, the bending region of the OLED display panel is generally bent to the back of the OLED display panel, thereby reducing the width of the bezel. However, the bending of the bending region of the OLED display panel easily causes the circuit in the OLED display panel to break, and in order to prevent the circuit from breaking due to bending, the bending region of the OLED display panel is usually covered with UV glue to relieve the bending stress of the bending region of the OLED display panel.

However, the thickness of the UV glue is about 95 μm, and when the cover plate and the color film are bonded by the optical glue, the cover plate may extrude the UV glue due to the thinner thicknesses of the color film and the optical glue, so that the OLED display panel has a risk of cracking.

Disclosure of Invention

Therefore, there is a need for a display device to solve the problem of cracking risk of the OLED display panel.

An embodiment of the present invention provides a display device, including:

the flexible screen body comprises a plane area and a bending area connected with the plane area;

the color film is arranged on the flexible screen body and at least covers the plane area;

the protective layer is arranged on the flexible screen body and at least covers part of the bending area;

the cover plate is arranged on the color film and at least covers the plane area;

wherein, in the overlapping area of the protective layer and the cover plate, the distance between the protective layer and the cover plate is larger than or equal to a preset value.

In some embodiments, the protective layer is only disposed on the surface of the flexible screen body, and the thickness of the protective layer on the surface of the flexible screen body is less than or equal to the distance between the side of the cover plate close to the flexible screen body and the side of the flexible screen body close to the cover plate.

In some embodiments, the display device further includes a touch layer disposed between the flexible screen body and the color film, and an insulating layer disposed between the touch layer and the color film, the protective layer is disposed only on a surface of the insulating layer, and a thickness of the protective layer on the surface of the insulating layer is smaller than or equal to a distance from a side of the cover plate close to the insulating layer to a side of the insulating layer close to the cover plate.

In some embodiments, the protective layer is further disposed on the surface of the color film, and the thickness of the protective layer on the surface of the color film is less than or equal to the distance from the side of the cover plate close to the color film to the side of the color film close to the cover plate.

In some embodiments, the bending region includes a bending transition sub-region, a bending sub-region, and a bending extension sub-region, which are connected to the planar region and sequentially arranged, and the bending transition sub-region is flush with the planar region;

the protective layer completely covers the bending sub-area and at least covers part of the bending transition sub-area;

the cover plate is connected with the color film through optical cement, completely covers the plane area and at least covers part of the bending transition sub-area.

In some embodiments, the thickness of the optical cement is greater than the maximum thickness of the protective layer at the bending transition sub-region.

In some embodiments, the protective layer further covers at least a portion of the bend extension sub-region.

In some embodiments, the protective layer is a UV glue.

In some embodiments, the display device further comprises:

and one side of the supporting layer supports the plane area and the bending transition sub-area, and one side of the supporting layer, which is far away from the plane area, supports the bending extension sub-area.

In some embodiments, the support layer comprises a first back plate disposed on a side of the planar area and the bending transition sub-area away from the cover plate and a second back plate disposed on a side of the bending transition sub-area away from the protective layer; foam is arranged between the first back plate and the second back plate; a reinforcing plate is arranged between the foam and the second back plate; the foam and the reinforcing plate are provided with a heat dissipation layer therebetween.

According to the display device provided by the embodiment of the invention, the distance between the protective layer and the cover plate is larger than or equal to the preset value in the overlapped area of the protective layer and the cover plate, so that the cover plate cannot extrude the protective layer, and the cracking risk of the display device is eliminated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display device according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a display device according to still another embodiment of the invention;

fig. 4 is a schematic structural diagram of a display device according to yet another embodiment of the present invention;

fig. 5 is a flowchart of a method for manufacturing a display device according to an embodiment of the invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the present invention provides a display apparatus, where the display apparatus may be a wearable device, such as a smart bracelet, a smart watch, or a Virtual Reality (VR) device, or may also be a mobile phone, an electronic book, an electronic newspaper, a television, or a personal portable computer, or may also be a flexible OLED display or lighting device that can be bent and folded, and a specific form of the display apparatus is not specifically limited in the embodiment of the present invention.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 1, the display device includes a flexible screen body 10, a color film 50, a protective layer 30, and a cover plate 40, and optionally, the display device may further include a supporting layer 20 and an optical adhesive 60, and the flexible screen body 10, the supporting layer 20, the protective layer 30, the cover plate 40, the color film 50, and the optical adhesive 60 are specifically described below.

The flexible screen body 10 refers to a screen with high flexibility that can be bent and folded, and the flexible screen body 10 may be divided into a planar area AA and a bending area extending from the planar area AA, where the planar area AA refers to an area where display is possible, and the bending area refers to an area where display is not possible. The bending region may include a bending transition sub-region B1, a bending sub-region B2, and a bending extension sub-region B3, which are sequentially disposed, wherein opposite ends of the bending transition sub-region B1 are respectively connected to the plane region AA and the bending sub-region B2, and opposite ends of the bending sub-region B2 are respectively connected to the bending transition sub-region B1 and the bending extension sub-region B3. The bending transition sub-area B1 is flush with the plane area AA, that is, the bending transition sub-area B1 is located on the same plane as the plane area AA, and neither the bending sub-area B2 nor the bending extension sub-area B3 is flush with the plane area AA, that is, the bending sub-area B2 is located on a different plane from the plane area AA, and the bending extension sub-area B3 is located on a different plane from the plane area AA.

Specifically, the flexible screen body 10 includes a flexible substrate, which is a substrate made of a flexible material, preferably Polyimide (PI), and the flexible substrate may be divided into a first region and a second region extending from the first region.

A display layer may be integrated on the first area of the flexible substrate, and the display layer may comprise a plurality of display elements for displaying images, such that the first area of the flexible substrate and the display layer together form a planar area AA of the flexible screen body 10. The display layer may include different display components such as a thin film transistor, a gate line, a data line, a capacitor, an anode, a cathode, and a light emitting layer, and the structure of the planar area AA itself of the flexible screen body 10 is not modified by the embodiment of the present invention, and the structure thereof is not particularly limited by the embodiment of the present invention.

The second region of the flexible substrate is provided with an integrated circuit for realizing functions of signal transmission, image display driving and the like, so that the second region of the flexible substrate and the integrated circuit form a bending region of the flexible screen body 10 together.

In order to realize the narrow frame design of the display device, the bending region of the flexible screen 10 is usually bent, as shown in fig. 1, in the embodiment of the present invention, a bending sub-region B2 of the flexible screen 10 is bent by 180 degrees, so that the whole body formed by the plane region AA and the bending transition sub-region B1 is opposite to and parallel to the bending extension sub-region B3, at this time, the bending sub-region B2 is in a semi-circular arc shape, the plane region AA, the bending transition sub-region B1, the bending sub-region B2, and the bending extension sub-region B3 form an accommodating groove, and the support layer 20 is located in the accommodating groove.

On one hand, on the other hand, the bending region of the flexible screen body 10 includes a bending transition sub-region B1 disposed between the plane region AA and the bending sub-region B2, so that the initial bending position of the flexible screen body 10 is a position where the bending sub-region B2 is connected to the bending transition sub-region B1, that is, the initial bending position of the flexible screen body 10 deviates from a position where the plane region AA is connected to the bending region, both sides of the initial bending position are bending regions, which effectively alleviates a phenomenon of stress concentration caused by different structures of the two side regions of the initial bending position of the flexible screen body 10, and realizes protection of the bending starting position of the flexible screen body 10; on the other hand, since bending sub-region B2 and planar region AA are not directly adjacent to each other, and bending transition sub-region B1 is disposed therebetween, stress acting on planar region AA when bending sub-region B2 is bent is reduced, so that planar region AA is protected, for example, planar region AA is prevented from cracking.

One side of the support layer 20 supports the planar area AA and the bending transition sub-area B1 of the flexible screen body 10, one side of the support layer 20 away from the planar area AA supports the bending extension sub-area B3 of the flexible screen body 10, i.e. the planar area AA and the bending transition sub-area B1 of the flexible screen body 10 are arranged on the same side of the support layer 20, and the bending extension sub-area B3 of the flexible screen body 10 is arranged on the other side of the support layer 20 away from the planar area AA.

It should be noted that the supporting layer 20 is mainly used to fix and support the flexible screen 10, and prevent the bending sub-region B2 of the flexible screen 10 from being broken due to too much bending. The support layer 20 may be a material having hardness and elasticity, so as to support the flexible screen 10 and absorb shock for the flexible screen 10. The support layer 20 may be a single layer or a multi-layer structure, which is not particularly limited in this embodiment of the invention.

The protective layer 30 is disposed on a side of the flexible screen body 10 away from the support layer 20, the protective layer 30 covers at least a part of the bending sub-region, the protective layer 30 shown in fig. 1 completely covers the bending sub-region B2 of the flexible screen body 10, and covers at least a part of the bending transition sub-region B1 of the flexible screen body 10. The protective layer 30 shown in fig. 1 completely covers the bending sub-region B2 and the bending transition sub-region B1 of the flexible screen body 10, and of course, in other embodiments, the protective layer 30 may also completely cover the bending sub-region B2 and cover part of the bending transition sub-region B1 of the flexible screen body 10.

It should be noted that the protective layer 30 completely covers the bending subregion B2 of the flexible screen body 10, so as to relieve the bending stress of the bending subregion B2; the protective layer 30 covers at least a part of the bending transition sub-region B1 of the flexible screen 10, so that the protective layer 30 can better relieve the bending stress of the initial bending position of the flexible screen 10 from the side of the initial bending position of the flexible screen 10 close to the planar area AA, it should be noted that the distance between the side of the protective layer 30 close to the planar area AA and the initial bending position of the flexible screen 10 may also be greater than a first preset value, where the first preset value is a value greater than or equal to 0, and the first preset value may be flexibly adjusted according to actual requirements, which is not specifically limited in the embodiment of the present invention.

The planar area AA of the flexible screen body 10 includes a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, wherein the red sub-pixel unit is configured to emit red light, the green sub-pixel unit is configured to emit green light, and the blue sub-pixel unit is configured to emit blue light.

The color film 50 is disposed on a side of the flexible screen body 10 away from the supporting layer 20, the color film 50 at least covers the planar area AA, and the color film 50 is used to replace a polarizer and plays a role in preventing light leakage of the display device and reducing reflectivity of the display device.

Specifically, the color film 50 includes a plurality of color resistors and a black matrix disposed between different color resistors, where the plurality of color resistors includes a red color resistor, a green color resistor, and a blue color resistor, where the red color resistor is disposed corresponding to the red sub-pixel unit, and the red color resistor bears the light emitted from the red sub-pixel unit; the green color resistor is arranged corresponding to the green sub-pixel unit, and the green color resistor bears the light emitting of the green sub-pixel unit; the blue color resistor is arranged corresponding to the blue sub-pixel unit, and the blue color resistor bears the light emitting of the blue sub-pixel unit; the black matrix mainly plays a role in preventing light leakage of the display device and reducing the reflectivity of the display device.

The cover plate 40 is disposed on a side of the color film 50 away from the flexible screen body 10, the cover plate 40 at least covers the planar area AA, the cover plate 40 shown in fig. 1 is connected to the color film 50 through an optical adhesive 60, wherein the optical adhesive 60 is used for bonding an optical element, and the optical adhesive 60 may be an OCA optical adhesive having characteristics of being colorless and transparent, having a light transmittance of more than 90%, having good bonding strength, being curable at room temperature or at intermediate temperature, and having a small curing shrinkage, and in an embodiment of the present invention, the optical adhesive 60 is used for bonding the cover plate 40 and the color film 50. The cover plate 40 is used to protect the flexible screen body 10 from being damaged by external impact force.

In the display device provided in the embodiment of the invention, in the overlapping area between the protection layer 30 and the cover plate 40, the distance between the protection layer 30 and the cover plate 40 is greater than or equal to a preset value, it should be noted that the preset value is a value greater than 0, and the preset value can be flexibly adjusted according to actual requirements (for example, process precision), which is not specifically limited in the embodiment of the invention. In this way, the cover plate 40 does not press the protective layer 30, eliminating the risk of cracking of the display device.

Based on the above embodiment, please refer to fig. 2, the protection layer 30 is only disposed on the surface of the flexible screen body 10, and the thickness of the protection layer 30 on the surface of the flexible screen body 10 is smaller than or equal to the distance between the side of the cover plate 40 close to the flexible screen body 10 and the side of the flexible screen body 10 close to the cover plate 40.

Based on the above embodiment, referring to fig. 3, the display device further includes a touch layer 70 disposed between the flexible screen body 10 and the color film 50, and an insulating layer 80 disposed between the touch layer 70 and the color film 50, the protective layer 30 is only disposed on the surface of the insulating layer 80, and the thickness of the protective layer 30 on the surface of the insulating layer 80 is less than or equal to the distance from the side of the cover plate 40 close to the insulating layer 80 to the side of the insulating layer 80 close to the cover plate 40.

Based on the above embodiment, please refer to fig. 1 and fig. 4, the protection layer 30 is further disposed on the surface of the color film 50, and the thickness of the protection layer 30 on the surface of the color film 50 is smaller than or equal to the distance from the side of the cover plate 40 close to the color film 50 to the side of the color film 50 close to the cover plate 40.

Based on the above embodiments, in the embodiment of the present invention, the thickness of the optical adhesive 60 is greater than the maximum thickness of the protective layer 30 in the bending transition sub-area B1 of the flexible screen body 10, so that a certain distance is ensured between the cover plate 40 covering the bending transition sub-area B1 of the flexible screen body 10 and the protective layer 30 covering the bending transition sub-area B1 of the flexible screen body 10, the cover plate 40 does not squeeze the protective layer 30, and the risk of cracking of the display device is eliminated.

Based on the above embodiments, the display device is further described in the embodiments of the present invention, the protective layer 30 further covers at least a portion of the bending extension sub-region B3 of the flexible screen 10, so as to better relieve the bending stress at the bending position of the end of the flexible screen 10. It should be noted that, a distance between the side edge of the protection layer 30 close to the bending extension sub-region B3 and the end bending position of the flexible screen body 10 may also be greater than a second preset value, where the second preset value is a value greater than or equal to 0, and the second preset value may be flexibly adjusted according to actual requirements, which is not specifically limited in this embodiment of the present invention. The protective layer 30 shown in fig. 1 covers part of the bending extension sub-region B3 of the flexible screen body 10, and of course, in other embodiments, the protective layer 30 may also completely cover the bending extension sub-region B3 of the flexible screen body 10.

Based on the above embodiments, in some embodiments, the protection layer 30 is a UV glue, and of course, in other embodiments, the protection layer 30 is not limited to the UV glue, and may also be a thermal curing glue or other kinds of photo-curing glue, which is not specifically limited in this embodiment of the present invention. It should be noted that, in the case that the distance between the cover plate 40 and the protection layer 30 is greater than 0, a person skilled in the art may set a suitable thickness for the protection layer 30 according to the size and the type of the flexible screen body 10, the bending radius of the bending sub-region B2, the flexibility of the protection layer 30, and the capability of relieving stress, and the embodiment of the present invention is not limited thereto.

Based on the above embodiments, the display device is further described in the embodiments of the present invention, the support layer 20 includes a first back plate 201 disposed on a side of the planar area AA and the bending transition sub-area B1 of the flexible screen body 10 away from the cover plate 40, and a second back plate 202 disposed on a side of the bending extension sub-area B3 of the flexible screen body 10 away from the protective layer 30. Wherein, the bending extension sub-area B3 can be fixed on the second back plate 202 by gluing or physical method.

It should be noted that the first back plate 201 is used to support and protect the planar area AA and the bending transition sub-area B1 of the flexible screen body 10 from being damaged by external impact force, and the second back plate 202 is used to support and protect the bending extension sub-area B3 of the flexible screen body 10 from being damaged by external impact force. The first back sheet 201 and the second back sheet 202 may be made of Polyethylene terephthalate (PET), and because the PET has the advantages of low elastic modulus and low thermal expansion tendency, the first back sheet 201 and the second back sheet 202 made of PET are not deformed due to the change of environmental temperature, the possibility of peeling the first back sheet 201 and the film layer connected thereto and the possibility of peeling the second back sheet 202 and the film layer connected thereto are reduced, and thus the yield and reliability of the display device are improved.

Further, in order to prevent the first back plate 201 and the second back plate 202 from affecting the bending of the bending sub-area B2 of the flexible screen body 10, it is necessary to ensure that both the first back plate 201 and the second back plate 202 avoid the bending sub-area B2. Preferably, for better supporting the plane area AA and the bending transition sub-area B1 of the flexible screen body 10, the edge of the first back plate 201 coincides with the initial bending position of the flexible screen body 10, and similarly, for better supporting the bending extension sub-area B3 of the flexible screen body 10, the edge of the second back plate 202 coincides with the terminal bending position of the flexible screen body 10.

Based on the above embodiments, in some embodiments, the support layer 20 further includes an elevation block disposed between the first back plate 201 and the second back plate 202, and the height of the elevation block may also be adjusted according to the width of the bending sub-area B2 of the flexible screen body 10, which is not particularly limited by the embodiments of the present invention. The bed hedgehopping piece can be materials such as silica gel, and the bed hedgehopping piece can have certain elasticity and hardness, and the bed hedgehopping piece has certain hardness in order to avoid flexible screen body 10 is by extrusion deformation, and the bed hedgehopping piece has certain elasticity in order to avoid flexible screen body 10 damages owing to receiving local stress.

Specifically, the block is disposed to avoid the bending sub-region B2 of the flexible screen 10. Of course, in other embodiments, the surface of the end of the heightening block close to the bending sub-region B2 of the flexible screen body 10 matches with the shape of the bending sub-region B2 after bending, so that the surface of the bending sub-region B2 close to the side of the heightening block is attached to the surface of the heightening block, and further has a certain supporting effect on the bending sub-region B2, and is not easy to deform and damage. It is understood that in other embodiments, the distance between the planar area AA and the bending extension sub-area B3 of the flexible screen body 10 may be ensured by increasing the thickness of the first back-plate 201 and the second back-plate 202 or adding other support structures.

Based on the above embodiments, in some embodiments, foam 203 is disposed between the first back sheet 201 and the second back sheet 202. The foam 203 is a material foamed by plastic particles, and can play a role in cushioning and shading.

Based on the above embodiments, in some embodiments, a stiffening plate 204 is disposed between the foam 203 and the second back plate 202. The reinforcing plate 204 is used to increase the strength of the flexible screen body 10. The reinforcing plate 204 may be a polyimide layer or a graphite layer, wherein an outer surface of the graphite layer may be further coated with polyimide, which is not specifically limited in this embodiment of the present invention.

Based on the above embodiments, in some embodiments, a heat dissipation layer 205 is disposed between the foam 203 and the stiffener 204. The heat dissipation layer 205 plays a role in shielding and dissipating heat, the heat dissipation layer 205 is made of a heat dissipation material, specifically, a metal material or graphite, and the like, where the metal may be a copper foil, an aluminum foil, or a stainless steel foil, and the like, and this is not limited in the embodiment of the present invention.

Based on the above embodiments, in some embodiments, the display device further comprises a driving unit disposed in the bend extension sub-region B3. In particular, the drive unit is arranged at the surface of the bend extension sub-region B3 of the flexible screen body 10 remote from the support layer 20. The driving unit comprises a driving chip and a flexible circuit board, wherein the driving chip and the flexible circuit board are both arranged on the surface of the bending extension sub-area B3 of the flexible screen body 10 away from the supporting layer 20, and the distance between the flexible circuit board and the driving chip is greater than 0.

Based on the above embodiments, in some embodiments, the planar area AA of the flexible screen body 10 includes a flexible substrate, a thin film transistor, a display device, and an encapsulation layer, wherein the flexible substrate is disposed on the first backplane 201, the thin film transistor is disposed on the flexible substrate, the display device is disposed on the thin film transistor, and the encapsulation layer is disposed on the display device.

The flexible substrate is a substrate made of a flexible material, and the flexible material is preferably Polyimide (PI).

A display device is used for emitting light, and generally includes an Anode (Anode) disposed on a thin film transistor, a Hole Injection Layer (HIL) disposed on the Anode, a Hole Transport Layer (HTL) disposed on the Hole Injection Layer, a light emitting Layer (EML) disposed on the Hole Transport Layer, an Electron Transport Layer (ETL) disposed on the light emitting Layer, an Electron Injection Layer (EIL) disposed on the Electron Transport Layer, and a Cathode (Cathode) disposed on the Electron Transport Layer. Optionally, a Hole Blocking Layer (HBL), an Electron Blocking Layer (EBL), and a Capping Layer (CPL) may be further disposed in the display device.

The light emitting layer comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, wherein the red sub-pixel unit is used for emitting red light, the green sub-pixel unit is used for emitting green light, and the blue sub-pixel unit is used for emitting blue light.

The color film 50 is used to replace a polarizer and plays a role in preventing light leakage of the display device and reducing the reflectivity of the display device. Specifically, the color film 50 includes a plurality of color resistors and a black matrix disposed between different color resistors, where the plurality of color resistors includes a red color resistor, a green color resistor, and a blue color resistor, where the red color resistor is disposed corresponding to the red sub-pixel unit, and the red color resistor bears the light emitted from the red sub-pixel unit; the green color resistor is arranged corresponding to the green sub-pixel unit, and the green color resistor bears the light emitting of the green sub-pixel unit; the blue color resistor is arranged corresponding to the blue sub-pixel unit, and the blue color resistor bears the light emitting of the blue sub-pixel unit; the black matrix mainly plays a role in preventing light leakage of the display device and reducing the reflectivity of the display device.

The packaging layer is used for isolating external water and oxygen for the display device, and the yield of the display device is guaranteed. The encapsulation layer is generally a sandwich structure of organic, inorganic and organic layers.

Based on the above embodiments, the embodiments of the present invention describe a method for manufacturing the display device. Fig. 5 is a flowchart of a manufacturing method of a display device according to an embodiment of the present invention, and as shown in fig. 5, the manufacturing method includes:

s1, the flexible screen 10 is fabricated on a glass substrate.

The flexible screen body 10 refers to a screen with high flexibility that can be bent and folded, and the flexible screen body 10 may be divided into a planar area AA and a bending area extending from the planar area AA, where the planar area AA refers to an area where display is possible, and the bending area refers to an area where display is not possible. The bending region comprises a bending transition sub-region B1, a bending sub-region B2 and a bending extension sub-region B3 which are arranged in sequence, wherein two opposite ends of the bending transition sub-region B1 are respectively connected with the plane region AA and the bending sub-region B2, and two opposite ends of the bending sub-region B2 are respectively connected with the bending transition sub-region B1 and the bending extension sub-region B3. The bending transition sub-area B1 is flush with the plane area AA, that is, the bending transition sub-area B1 is located on the same plane as the plane area AA, and neither the bending sub-area B2 nor the bending extension sub-area B3 is flush with the plane area AA, that is, the bending sub-area B2 is located on a different plane from the plane area AA, and the bending extension sub-area B3 is located on a different plane from the plane area AA.

And S2, manufacturing the color film 50 on the flexible screen body 10.

Specifically, the planar area AA of the flexible screen body 10 includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, the color film 50 includes a plurality of color resistors and a black matrix disposed between the color resistors, the color resistors include a red color resistor, a green color resistor, and a blue color resistor, the red color resistor is disposed corresponding to the red sub-pixel unit, the green color resistor is disposed corresponding to the green sub-pixel unit, and the blue color resistor is disposed corresponding to the blue sub-pixel unit. It should be noted that, in some embodiments, a planarization layer may be further formed on the color film 50 to planarize the color film 50.

And S3, bonding the driving chip and the flexible circuit board to the bending area of the flexible screen body 10, and covering the bending area of the flexible screen body 10 with UV glue.

Specifically, the driving chip and the flexible circuit board are both disposed on the surface of the bending extension sub-region B3 of the flexible screen body 10 away from the support layer 20, and the distance between the flexible circuit board and the driving chip is greater than 0. The bending region of the flexible screen body 10 is covered with the UV glue, so that the UV glue completely covers the bending sub-region B2 and at least covers a part of the bending transition sub-region B1.

S4, the glass substrate is peeled off, and the support layer 20 and the flexible panel 10 are bonded.

In particular, one side of the support layer 20 supports the planar area AA and the bending transition sub-area B1 of the flexible screen body 10, one side of the support layer 20 remote from the planar area AA supports the bending extension sub-area B3 of the flexible screen body 10, i.e. the planar area AA and the bending transition sub-area B1 of the flexible screen body 10 are arranged on the same side of the support layer 20, and the bending extension sub-area B3 of the flexible screen body 10 is arranged on the other side of the support layer 20 remote from the planar area AA. It should be noted that the supporting layer 20 is mainly used to fix and support the flexible screen 10, and prevent the bending sub-region B2 of the flexible screen 10 from being broken due to too much bending. The support layer 20 may be a material having hardness and elasticity, so as to support the flexible screen 10 and absorb shock for the flexible screen 10. The support layer 20 may be a single layer or a multi-layer structure, which is not particularly limited in this embodiment of the invention.

And S5, attaching the cover plate 40 and the color film 50 through the optical cement 60, wherein the thickness of the optical cement 60 is greater than the maximum thickness of the UV cement.

Specifically, the optical adhesive 60 is used to attach the cover plate 40 to the color film 50, so that the cover plate 40 completely covers the planar area AA of the flexible screen body 10 and at least partially covers the bending transition sub-area B1 of the flexible screen body 10. Because the thickness of the optical cement 60 is greater than the maximum thickness of the UV cement, the cover plate 40 does not generate pressure on the UV cement during the attaching process of the cover plate 40 and the color film 50, and the risk of the module manufacturing process of the display device is reduced.

It should be noted that, the reference numbers of the above steps do not strictly represent the execution order of the steps, and in some embodiments, the corresponding steps may be executed strictly according to the reference number order of the above steps, of course, in other embodiments, some steps may be executed at the same time or in an order changed, and this is not specifically limited in the embodiments of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A display device, characterized in that the display device comprises:

2. The display device according to claim 1, wherein the protective layer is only disposed on the surface of the flexible screen body, and a thickness of the protective layer on the surface of the flexible screen body is smaller than or equal to a distance between a side of the cover plate close to the flexible screen body and a side of the flexible screen body close to the cover plate.

3. The display device according to claim 1, further comprising a touch layer disposed between the flexible screen body and the color film, and an insulating layer disposed between the touch layer and the color film, wherein the protective layer is only disposed on a surface of the insulating layer, and a thickness of the protective layer on the surface of the insulating layer is smaller than or equal to a distance from a side of the cover plate close to the insulating layer to a side of the insulating layer close to the cover plate.

4. The display device according to claim 2 or 3, wherein the protective layer is further disposed on a surface of the color filter, and a thickness of the protective layer on the surface of the color filter is smaller than or equal to a distance from a side of the cover plate close to the color filter to a side of the color filter close to the cover plate.

5. The display device according to claim 1, wherein the bending area comprises a bending transition sub-area, a bending sub-area and a bending extension sub-area which are connected with the planar area and arranged in sequence, and the bending transition sub-area is flush with the planar area;

6. The display device according to claim 5, wherein the thickness of the optical glue is larger than the maximum thickness of the protective layer in the bending transition sub-region.

7. The display device according to claim 5, wherein the protective layer further covers at least a portion of the bend extension sub-region.

8. The display device according to claim 5, wherein the protective layer is a UV glue.

9. The display device according to claim 5, further comprising:

10. The display device according to claim 9, wherein the support layer comprises a first back plate disposed on a side of the planar area and the bend transition sub-area away from the cover plate and a second back plate disposed on a side of the bend transition sub-area away from the protective layer; foam is arranged between the first back plate and the second back plate; a reinforcing plate is arranged between the foam and the second back plate; the foam and the reinforcing plate are provided with a heat dissipation layer therebetween.